1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

http://www.intersil.com or 407-727-9207

July 1998

HI7106

Features

• Guaranteed Zero Reading for 0V Input on All Scales

• True Polarity at Zero for Precise Null Detection

• 1pA Typical Input Current

• True Differential Input and Reference,

Direct Display Drive

• Low Noise - Less Than 15

• On Chip Clock and Reference

• Low Power Dissipation - Typically Less Than 10mW

• No Additional Active Circuits Required

• Enhanced Display Stability

• Enhanced VCOM Reference Stability

Description

digit A/D converter. Included are seven segment decoders,

display drivers, a reference, and a clock. The HI7106 is

designed to interface with a liquid crystal display (LCD) and

includes a multiplexed backplane drive.

The HI7106 brings together a combination of high accuracy,

versatility, and true economy. It features auto-zero to less

than 10

of 10pA (Max), and rollover error of less than one count.

True differential inputs and reference are useful in all sys-

tems, but give the designer an uncommon advantage when

measuring load cells, strain gauges and other bridge type

transducers. Finally, the true economy of single power supply

operation enables a high performance panel meter to be built

with the addition of only 10 passive components and a display.

Ordering Information

PART NO.

TEMP.

PACKAGE

PKG. NO.

HI7106CPL

0 to 70

40 Ld PDIP

E40.6

HI7106CM44

0 to 70

44 Ld MQFP

Q44.10x10

HI7106C/D

0 to 70

DIE

Pinouts

HI7106

(PDIP)

TOP VIEW

HI7106

(MQFP)

TOP VIEW

13

1

2

3

4

5

6

7

8

9

10

11

12

14

15

16

17

18

19

20

V+

D1

C1

B1

A1

F1

G1

E1

D2

C2

B2

A2

F2

E2

D3

B3

F3

E3

(1000) AB4

POL

28

40

39

38

37

36

35

34

33

32

31

30

29

27

26

25

24

23

22

21

OSC 1

OSC 2

OSC 3

TEST

REF HI

REF LO

COMMON

IN HI

IN LO

A-Z

BUFF

INT

V-

G2 (10’s)

C3

A3

G3

BP/GND

(1’s)

(10’s)

(100’s)

(MINUS)

(100’s)

OSC 2

NC

OSC 3

TEST

NC

NC

1

2

3

4

5

6

7

8

9

10

11

12 13 14 15 16 17

OSC 1

V+

D1

C1

B1

A1 F1 G1 E1 D2 C2

28

27

26

25

24

23

22

21

20

19

18

B2 A2 F2 E2 D3

B3

F3

E3

AB4

POL

BP/GND

39 38 37 36 35 34

33

32

31

30

29

44 43 42 41 40

NC

G2

C3

A3

G3

File Number

4551